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Call Progress Analysis

1 API Integration with CPA

LumenVox CPA functionality was designed to be compatible with our generic LumenVox C/C++ APIs, so if you have previously built an application using one of our APIs, it should be relatively simple to add support for CPA (if you have never used our API, please…

2 CPA - Functional Overview

LumenVox CPA combines two discrete technologies into a single software module: Call Progress Analysis: using the advanced voice activity detection (VAD) algorithms employed by the LumenVox Automatic Speech Recognizer (ASR), LumenVox CPA is able to accurately…

3 Customizing CPA and Tone Detection

There are a few custom settings that can be applied to both the Call Progress Analysis (CPA) and Answering Machine tone Detection (AMD) algorithms in order to change their behavior. These are controlled using special "CPA" and "AMD" grammars, which signal…

4 Installing CPA

As CPA is a module of the LumenVox ASR, there is no individual CPA installation package to download. Instead, users must install the normal set of packages required by a LumenVox ASR installation (please see the Windows Installation or Linux Installation…

5 Using CPA in an Application

This article describes how to use LumenVox Call Progress Analysis (CPA) in an application Detection Modes For any given recognition, the LumenVox ASR can be in any or all of the following detection modes: Standard VAD: used for standard speech recognition.…

6 Using CPA on a Voice Platform

Asterisk To use CPA on Asterisk, you must make of use the Asterisk-UniMRCP modules (see our Asterisk documentation article for details). CPA does not work with the older, deprecated "connector bridge" module (res_speech_lumenvox.so). Once UniMRCP is installed…